Hydrogen Entry into Steel by Atmospheric Corrosion

Kondo, Takahiro

doi:10.2355/isijinternational.43.470

Cited by 90 publications

(51 citation statements)

References 9 publications

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“…It is worthwhile to note that the values are quite small than those obtained by Kushida et al. 14) Secondly we consider scale deformation. Main composition of oxide scale formed at high temperature is FeO.…”

Section: Nucleation Conditionmentioning

confidence: 39%

Blistering Behavior during Oxide Scale Formation on Steel Surface

Kondo¹,

Tanei²,

Suzuki³

et al. 2011

ISIJ Int.

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Blistering occurs when oxide scale is swollen during oxidation. Blistered scale causes surface defect problems when it is rolled. Present study investigated the nucleation and growth behavior of blistering when steel is oxidized at high temperature. The following conclusions are drawn. Blistering phenomenon has the nucleation and growth process. At the nucleation stage scale is delaminated at the scale/metal interface. The gas compositions inside blisters at this stage are CO, CO2, and N2. The steel surface inside blisters is oxidized while the stage changes from nucleation to growth. At the growth stage, the separated steel surface from the scale is not oxidized.

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Section: Nucleation Conditionmentioning

confidence: 39%

Blistering Behavior during Oxide Scale Formation on Steel Surface

Kondo¹,

Tanei²,

Suzuki³

et al. 2011

ISIJ Int.

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“…The concept of the critical hydrogen concentration 2) has been assumed as the criterion of hydrogen-related failure. However, recent findings 23,[25][26][27][28] have revealed that failure is not always associated with hydrogen content. Instead, fairly ample evidence 23,[26][27][28][29][30] is now available for claiming the essential role of the increased density of vacancies and their clusters in hydrogen-related failure, i.e., the binding of hydrogen with vacancies with an increase in the vacancy density.…”

Section: Discussionmentioning

confidence: 99%

Simulation of Hydrogen Thermal Desorption under Reversible Trapping by Lattice Defects

Yamaguchi

Nagumo

2003

ISIJ International

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The hydrogen thermal desorption of a martensitic steel has been simulated assuming lattice hydrogen diffusion under a local equilibrium with reversibly trapped hydrogen as the rate-determining process. The calculated desorption curves reproduced the observed shift of the peak temperature associated with the specimen thickness and the heating rate. The calculation method involves a combination of a defect density and a hydrogen/defect binding energy as parameters. The dependence of the peak temperature on the defect density and the binding energy has been quantitatively shown. Assignment of the lattice defect relevant to the desorption curves is discussed. A calculation that took into account the increase in the defect density yielded results consistent with the observed change in the desorption curves associated with plastic strain.KEY WORDS: thermal desorption analysis; hydrogen diffusion; lattice defect; hydrogen trap; hydrogen embrittlement.

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“…It is well-known that high strength steels, especially high strength steel bolts with tensile strengths more than 125 kg/mm 2 (1 225 MPa), suffer from hydrogen embrittlement under atmospheric exposure. 1) Therefore, hydrogen entry into steels has been widely studied to clarify the mechanism of hydrogen embrittlement in atmospheric environments.…”

Section: Introductionmentioning

confidence: 99%

“…Kushida investigated absorbed hydrogen concentration in low alloy steels that were exposed at various sites in Japan. 2) He revealed the site and time dependence of hydrogen absorption. Tsuru measured hydrogen entry from the thin water layer on the steel surface by hydrogen permeation techniques.…”

Section: Introductionmentioning

confidence: 99%